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</o:shapelayout></xml><![endif]--></head><body lang=FR-CH link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-family:"Garamond","serif";color:#44546A'>Dears FOters, re water pump upgrades : I do not think it is necessary, as long as you have a good OEM one. <o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Garamond","serif";color:#44546A'>My engine is fully prepped and ran an OEM pump with no issues for years. <o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Garamond","serif";color:#44546A'>I now rebuilt this OEM pump with a new seal, resurfaced the face where the seal spins, cleaned and repacked the bearings with water proof grease and off we go for another 50 years.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Garamond","serif";color:#44546A'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Garamond","serif";color:#44546A'>The problem with the stock repro pumps is that they may have slightly smaller vanes in the impeller (I noticed this on pumps sold by Moss in the 90s). This severely impacts the flow.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Garamond","serif";color:#44546A'>And at $30-50 each manufactured overseas you cannot expect much of close tolerances, steel shaft quality, etc.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Garamond","serif";color:#44546A'>Increased flow may actually not be an improvement : the greater flow (if it effectively is greater) may create cavitation and /or turbulences and air pockets, thus effectively reducing the cooling. <o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Garamond","serif";color:#44546A'>I experienced this in a Lotus Esprit engine where the previous owner had increased the speed of the pump by fitting a smaller pulley.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Garamond","serif";color:#44546A'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Garamond","serif";color:#44546A'>And remember : the great Kas Kastner himself was running fully prepped engines with the stock pump (as far as I know).<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Garamond","serif";color:#44546A'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Garamond","serif";color:#44546A'>Cheers to all and have a great racing season !<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Garamond","serif";color:#44546A'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Garamond","serif";color:#44546A'>Alex Camoletti <o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Garamond","serif";color:#44546A'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Garamond","serif";color:#44546A'>(Switzerland, 1959 3A)<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Garamond","serif";color:#44546A'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=FR style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>De :</span></b><span lang=FR style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Fot [mailto:fot-bounces@autox.team.net] <b>De la part de</b> Phil Gott via Fot<br><b>Envoyé :</b> jeudi 28 avril 2022 12:35<br><b>À :</b> fot@autox.team.net; enquiries@roadandtrack.net.au<br><b>Objet :</b> Re: [Fot] TR water pump upgrade<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>My own experience has been that some of these "upgraded" pumps such as one sold by Moss use a much smaller stud to hold the pulley on. Over time, this will break with potentially catastrophic results. (ask me how I know!)<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Phil Gott<br><br><br>-----Original Message-----<br>From: John H. Hasty via Fot <fot@autox.team.net><br>To: Enquiries Road & Track <enquiries@roadandtrack.net.au><br>Cc: FOT <fot@autox.team.net><br>Sent: Wed, Apr 27, 2022 7:10 pm<br>Subject: Re: [Fot] TR water pump upgrade<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Contact Brian Howlett @ BFE<br><br>Sent from my iPhone<br><br>> On Apr 27, 2022, at 7:02 PM, Enquiries Road & Track via Fot <<a href="mailto:fot@autox.team.net">fot@autox.team.net</a>> wrote:<br>> <br>> <br>> does anyone have real-world / hands-on experience with the supposed "upgrade" water pumps that used to be sold for the 4 cyl TR range??. My research suggests some used a different 6 vane impellor that have a taper top, so an insert was used in the pump housing to match this shape. some were just a 6 vane impellor with an otherwise stock pump. <br>> <br>> thanks<br>> terry<br>> Australia<br>> <br>> <br>> _______________________________________________<br>> <a href="mailto:fot@autox.team.net">fot@autox.team.net</a><br>> <br>> <a href="http://www.fot-racing.com/" target="_blank">http://www.fot-racing.com</a><br>> <br>> Donate: <a href="http://www.team.net/donate.html" target="_blank">http://www.team.net/donate.html</a><br>> Archive: <a href="http://autox.team.net/archive" target="_blank">http://autox.team.net/archive </a><a href="http://www.team.net/pipermail/fot" target="_blank">http://www.team.net/pipermail/fot</a><br>> Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/fot/jhasty@mhc-law.com" target="_blank">http://autox.team.net/mailman/options/fot/jhasty@mhc-law.com</a><o:p></o:p></span></p><div id=yqtfd80255><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><br>> <br>> <br>_______________________________________________<br><a href="mailto:fot@autox.team.net">fot@autox.team.net</a><br><br><a href="http://www.fot-racing.com/" target="_blank">http://www.fot-racing.com</a><br><br>Donate: <a href="http://www.team.net/donate.html" target="_blank">http://www.team.net/donate.html</a><br>Archive: <a href="http://autox.team.net/archive" target="_blank">http://autox.team.net/archive </a><a href="http://www.team.net/pipermail/fot" target="_blank">http://www.team.net/pipermail/fot</a><br>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/fot/vfracing@aol.com" target="_blank">http://autox.team.net/mailman/options/fot/vfracing@aol.com</a><br><br><o:p></o:p></span></p></div></div></div></div></body></html>